hard · GMAT Quant
An automated trading bot executes a strategy over 5 days. Each day, it can choose one of three actions: Buy (B), Sell (S), or Hold (H). To manage risk, the bot cannot Buy (B) the day after a Sell (S) and cannot Sell (S) the day after a Buy (B).
How many valid 5-day execution strategies are possible?
- 99
- 243
- 32
- 120
- 81
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